Novel perovskite type high-entropy oxide material with six-membered high-entropy B site, and preparation method thereof

A perovskite-type, oxide technology, applied in ceramic products, applications, household appliances, etc., can solve the problem of perovskite-type high-entropy oxides that have not yet been retrieved, and achieve on-demand performance regulation, high specific surface area, Ease of control

Active Publication Date: 2019-12-13
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are no relevant reports on this series of perovskite-type high-entropy oxides, especially perovskite-type nanocrystalline powders.

Method used

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  • Novel perovskite type high-entropy oxide material with six-membered high-entropy B site, and preparation method thereof
  • Novel perovskite type high-entropy oxide material with six-membered high-entropy B site, and preparation method thereof
  • Novel perovskite type high-entropy oxide material with six-membered high-entropy B site, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The novel perovskite-type high-entropy oxide powder of a B-position six-element high-entropy described in the present invention is prepared by solution combustion method, and its chemical composition is Sm(Al 1 / 6 Cr 1 / 6 Fe 1 / 6 mn 1 / 6 co 1 / 6 Ni 1 / 6 )O 3 . Weigh the corresponding rare earth nitrate and metal nitrate according to the stoichiometric ratio of the molecular formula, specifically 5.334g of Sm(NO 3 ) 3 9H 2 O, 0.750g of Al(NO 3 ) 3 9H 2 O, 0.8004g of Cr(NO 3 )3·9H 2 O, 0.808g of Fe(NO 3 ) 3 9H 2 O, 0.574g of Mn(NO 3 )2·4H 2 O, 0.582g of Co(NO 3 ) 2 ·6H 2 O and 0.582g of Ni(NO 3 ) 2 ·6H 2 O, dissolved in 5mL distilled water, stirred evenly at room temperature to obtain a mixed solution containing a rare earth cation and six metal cations; then weighed 0.901g glycine and added it to the mixed solution, stirred evenly; then put the above transparent sol Dry in an oven at 80°C to obtain a viscous gel after evaporating water; finally put the ...

Embodiment 2

[0029] The novel perovskite-type high-entropy oxide powder of a B-position six-element high-entropy described in the present invention is prepared by solution combustion method, and its chemical composition is La(Al 1 / 6 Cr 1 / 6 Fe 1 / 6 mn 1 / 6 Mg 1 / 6 Ni 1 / 6 )O 3 . Weigh the corresponding rare earth nitrate and metal nitrate according to the stoichiometric ratio of the molecular formula, specifically 5.196g of La(NO 3 ) 3 9H 2 O, 0.750g of Al(NO 3 ) 3 9H 2 O, 0.8004g of Cr(NO 3 ) 3 9H 2 O, 0.808g of Fe(NO 3 ) 3 9H 2 O, 0.574g of Mn(NO 3 ) 2 4H 2 O, 0.513g Mg(NO 3 ) 2 ·6H 2 O and 0.582g of Ni(NO 3 ) 2 ·6H 2 O, dissolved in 10mL distilled water, stirred evenly at room temperature to obtain a mixed solution containing a rare earth cation and six metal cations; then weighed 8.648g glucose and added to the mixed solution, stirred evenly; then put the above transparent sol Dry in an oven at 100°C to obtain a viscous gel after evaporating water; finally put the ...

Embodiment 3

[0031] The novel perovskite-type high-entropy oxide powder of a B-position six-element high-entropy described in the present invention is prepared by a solution combustion method, and its chemical composition is Gd(Al 1 / 6 Cr 1 / 6 Fe 1 / 6 mn 1 / 6 Mg 1 / 6 Zn 1 / 6 )O 3 . Weigh the corresponding rare earth nitrate and metal nitrate according to the stoichiometric ratio of the molecular formula, specifically 5.416g of Gd(NO 3 ) 3 9H 2 O, 0.750g of Al(NO 3 ) 3 9H 2 O, 0.8004g of Cr(NO 3 ) 3 9H 2 O, 0.808g of Fe(NO 3 ) 3 9H 2 O, 0.574g of Mn(NO 3 ) 2 4H 2 O, 0.513g Mg(NO 3 ) 2 ·6H 2 O and 0.595g of Zn(NO 3 ) 2 ·6H 2 O, dissolved in 8mL distilled water, stirred evenly at room temperature to obtain a mixed solution containing a rare earth cation and six metal cations; then weigh 3.364g of hexamethylenetetramine and add it to the mixed solution, and stir evenly; Then put the above-mentioned transparent sol in an oven at 150°C to dry, and obtain a viscous gel after e...

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Abstract

The invention provides a novel perovskite type high-entropy oxide material with a six-membered high-entropy B site, and a preparation method thereof, and relates to the technical field of high-entropyoxide materials. The chemical formula of the material is RE(Al1 / 6Cr1 / 6Fe1 / 6Mn1 / 6M1 / 6N1 / 6)O3, wherein RE is one of rare earth cations such as La<3+>, Pr<3+>, Nd<3+>, Sm<3+>, Gd<3+> and Y<3+>, and M and N are any two of divalent cations such as Co<2+>, Ni<2+>, Mg<2+> and Zn<2+>. The perovskite type high-entropy oxide nanocrystal powder prepared by adopting a solution combustion technology has a theadvantages of high specific surface area, porous structure, uniform chemical composition and microstructure, convenience in regulation of the microstructure, and final realization of regulation of performances as required.

Description

technical field [0001] The invention relates to the technical field of high-entropy oxide materials, in particular to a novel perovskite-type high-entropy oxide material and a preparation method of a B-site six-element high-entropy oxide material. Background technique [0002] High-entropy oxides (HEOs) break the traditional design concept of doped oxides, and extend the design concept of high-entropy alloys to a new type of ceramic material developed in the field of oxides. This material is also called entropy stable Oxides are composed of five or more oxides in an equimolar or nearly equimolar ratio, and their configuration entropy is greater than or equal to 1.61R. On the one hand, the high-entropy oxide system is easy to form simple solid solution structures such as rock salt, fluorite, spinel or perovskite due to its high configuration entropy; , that is, its chemical composition is in a disordered state, which leads to various performances different from traditional d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/50C04B35/505C04B35/626C04B38/00
CPCC04B35/50C04B35/505C04B35/626C04B38/00C04B2235/3206C04B2235/3217C04B2235/3241C04B2235/3262C04B2235/3272C04B2235/3275C04B2235/3279C04B2235/3284C04B2235/5454C04B2235/768
Inventor 冒爱琴谢鸿翔项厚政俞海云郑翠红林娜
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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